No, this would be goaltending.
As long as they want.
NO
Yes. A defensive player can stay in the lane as long as they wish.
yes
No, that is considered a foul
Yes
All players in basketball play both offense and defense.
A BA in basketball is a blocked attempt. In other words, it is a shot that the player attempts that is subsequently blocked.
A helicopter in basketball is a type of dunk a basketball player may attempt.
yes, unless the shooter has landed on the floor
Mike Kelly
A defensive player may hold on to a ball carrier's jersey in an attempt to tackle him. However, if a defensive player holds on the the jersey of an offensive player who does not have the ball, that would be a penalty for holding. Likewise, if an offensive player holds on to a defensive player's jersey, that would also be called holding.